| 摘要 |
<p>The invention relates to a punching machine useful for copying plans/drawings comprising motor (1), reducing gear (2), needle-bearing staff (5), staff support collars (6) and (6'), springs (7) and (10), spring support collars (8) and (8'), clamping collar (9), needle (11), machine-base (12), machine-casing (13), handle (14), current transformer (15), switch-potentiometer (16). Motor (1) transmits the rotation action to reducing gear (2) to which is affixed shaft (3) with control lever (4) appropriately mounted on. Elongate needle-bearing staff (5) is supported at two ends by staff support collar (6) and (6'). Spring (7) is mounted at the upper end of staff (5) and interposed by upper staff support collar (6) and spring support collar (8). Campling collar (9) is fitted approximately in the middle of staff (5) and has lock nut (9') which can be pushed by control lever (4) of reducing gear (2) in order to raise staff (5) upwards, this clamping unit can be controlably moved upwards and downwards along staff (5). Spring (10) at the lower end of staff (5) is interposed between lower staff support collar (6') and spring support collar (8'). Needle (11) is correspondingly mounted at the lower end of staff (5). Machine-base (12) supports machine-casing (13). Handle (14) is affixed to machine-casing (13) to simplify the handling of the machine for the worker during the punching process. Current transformer (15) is connected to switch-potentiometer (16) equipped with control lever (17) to control transformer (15) for adjusting the electric current into motor (1).</p> |
